In the mid-22nd century, humanity has
begun to establish colonies in some of the stellar systems closest
to Earth. The story takes place on Okami, a planet which is home to a
rich variety of vegetative life. Ten years after settling on Okami,
the colonists inexplicably lose contact with Earth and all other
human colonies and ships. A few months later they are attacked by
previously dormant creatures native to Okami. The mycophytes, as the
creatures become known, seem to share characteristics with Earth
plants and fungi. Until the attack, humanity had yet to encounter
another intelligent species, let alone one with such an unexpected
physiology. Over the next few years, an apocalyptic, siege mentality
develops in the one remaining settlement on Okami. Further attacks
are repelled with minimal losses, but supplies are running short, and
there has still been no contact from off-world.

Tink is a teenage girl, the first human
born on Okami. A precocious engineer, her closest companion is Tank,
a construction / demolition robot she salvaged from a crashed cargo
ship. One day Tink makes a careless decision which exposes her
settlement to mycophyte attack. Too ashamed to face her family and
friends, Tink flees into the wilderness with Tank. She will soon
discover that the people in her settlement aren't the only humans
left on this suddenly hostile planet. She will make allies and
enemies during a struggle for survival which eventually turns into an
opportunity to discover what has happened to the rest of humanity and
why the mycophytes are attacking. Through the startling realities
that Tink uncovers, she finds a way to possibly redeem herself in the
eyes of those she loves, but it may cost her and her new-found
companions their lives.